The NFL is investigating whether Incognito harassed or bullied Martin, and whether their teammates and the organization mishandled the matter.

Cornwell is a lawyer who has represented the NFL and several prominent players, including Pittsburgh Steelers quarterback Ben Roethlisberger. He was a candidate in 2009 to become executive director of the NFL Players Association, a job that went to DeMaurice Smith.

Cornwell’s statement alleges an unidentified Dolphins player threatened Martin’s sister in vulgar fashion: “We are going to run train on your sister … She loves me. I am going to f— her without a condom …”

“For the entire season and a half that he was with the Dolphins, he attempted to befriend the same teammates who subjected him to the abuse with the hope that doing so would end the harassment,” the statement said. “This is a textbook reaction of victims of bullying. Despite these efforts, the taunting continued. …

“Eventually, Jonathan made a difficult choice. Despite his love for football, Jonathan left the Dolphins. Jonathan looks forward to getting back to playing football. In the meantime, he will cooperate fully with the NFL investigation.”

The Dolphins and Incognito’s agent didn’t respond to requests for comment on Cornwell’s statement.

Some say Martin, a Stanford graduate who went about his business quietly, handled the situation well. But pro football is a macho world, and some players believe Martin should have responded more firmly.

“But at the same time, Jonathan Martin is a 6-4, 320-pound man. I mean, at some point and time you need to stand your ground as an individual. Am I saying go attack, go fight him? No. I think we all understand we can stand our ground without anything being physical.”

“If there was one player that was there for him, it was Richie,” Murtha said. “Now was Richie hard on him? Yeah, he was hard on him. But he was hard on me — just as much if not more — and other players. (Martin) was never singled out as what is being portrayed, as he was singled out, bullied. If you really want to know, the truth is I was there. I’ve seen it. I was there for four months, breathing, living it every single day with these guys.”

Martin is with his family in California to undergo counseling for emotional issues.

A senior partner in a New York law firm was appointed by NFL Commissioner Roger Goodell to investigate possible misconduct and prepare a report.

The alleged bullying saga engulfing the Dolphins has shed a light on how damaging perceptions can be in the violent world of the NFL.

A Pittsburgh native, Martin is the son of Harvard graduates and his great grandfather also graduated from the school in 1924. At Stanford, he protected Andrew Luck’s blind side, and also majored in the classics.

Taken in the second round of the 2012 draft, Martin has what it takes physically to be an NFL player – size, skill, athleticism, intelligence. He won praise from the Dolphins for his diligent study of game and practice video.

But while he has been a starter since the first game of his rookie season, Martin developed a reputation in the NFL for lacking toughness. That impression might have been reinforced by the way he handled his issues with Incognito, current and former teammates acknowledge.

“A lot of people might look at Jonathan Martin and think that he’s soft because he stepped away from the game, and say, `Why don’t you just fight him?'” said Seattle Seahawks receiver Doug Baldwin, who played with Martin at Stanford. “Well, if you look at it with common sense and being logical, what options did Jonathan Martin have?

“He could fight Richie Incognito. He could go and tell on the players, which we know in the football locker room doesn’t go over too well. Or he could remove himself from the situation and let the proper channels take care of itself. And I think he made the intelligent, smart choice without putting himself or Richie Incognito’s physical abilities in danger.”

Houston Texans Antonio Smith, who has accused Incognito of dirty play since they went against each other in college, said Martin should have responded more forcefully. Smith drew a three-game suspension this year for taking Incognito’s helmet and hitting him during an exhibition game.

“I don’t think that in my opinion a grown man should get bullied,” Smith said. “And I think that if you’re realistically getting bullied, there’s only one way my mom taught me and my dad taught me how to get rid of bullies. They used to always say, `You hit a bully in the mouth. It will stop him from bullying, no matter what you hit him with.'”

Incognito’s harassment of Martin included text messages that were racist and threatening, two people familiar with the situation have told The Associated Press. Incognito is white, while Martin is biracial.

Two other people familiar with the situation have said Martin talked of quitting football earlier in his pro career before leaving the Dolphins. One person said Martin considered giving up the sport because of the way he was being treated by other offensive linemen on the team. The person added that Martin now wants to continue his football career.

The Dolphins (4-4) play for the first time since the scandal broke Monday night at Tampa Bay (0-8). At least 75 reporters and cameramen tracking the case were in the locker room after Thursday’s practice, but receiver Brian Hartline said the scrutiny won’t prevent the team from playing well.

“It almost heightens your awareness,” he said. “You know it’s going to take away from your focus, so it does the exact opposite. You overcompensate to make sure you stay aware of the game.”